Pump for land-burning machines



May 5, 1925. 1,536,521

v. w. PARRlsH PUMP FOR LAND BURNING MACHINES Filed Ja. 19. 1924 li@ y @A NuN'rn y UERNUNMPHRRIH.

BY Y j M 1,536,521 PATENT OFFICE.

VERNON Woon PAnnrsH, or MEDICINE HAT, ALBna'raoANAnA.

PUMP FO-LAVNDBURNING MACHINES.

Application med January 19, 1924. serial No. 687,285.

To all whom it may conc-ern: A

Be it known that I, VERNON WOOD PAR- RISH, a subject of the King Vof Greatlritain,

and resident Of the city of Medicine Hat, in the Province of Alberta, Dominion of Canada, have invented certain new and useful Improvements in Pumps4 for Land-Burning Machines, of which the following is a specication.

This invention relates to improvements in pumps for land burning machines.

The application is based upon my copending application for improvements in land burning machines generally, filed J anuary 19th,.1924, under Serial No. 687,284, and the present application deals more particularly with improvements in the pumping means, and the objects of the invention are to provide a self-regulating pump with valves all-in the bod of the pump and provided with means w ereby the pressure developed by the pump is automatically regulated.

Further objects are the provision of a pump for land burning machines and the like which can be set to desired pressure and which will not require to be interfered or tampered with while the machine is in operation. y

With the foregoing and other objects in view, the invention consists essentially of the improved construction and arrangement of parts hereinafter described and illustrated in the accompanying specification and drawings.

Referring now to the drawings, in which like characters of reference in icate corresponding parts in each figure:

Figure 1 is a rear view ofthe pump showing t e pipe connections.

Figure 2 is a side eleva-tion of the pump showing the pipe connections.

Figure 3 is a cross section through the pump showing the valves.

Figure lis a side elevation, partly in section, of the pump.

In the drawings, 9 designates the pump as a whole operated through the piston rod 23 by the piston 24 which moves backwards and forwards in the pump cylinder 25, the necessary packing of which is held'by the gland 26.

The pump consists essentially of a plurality of valves 8 as shown in Figure 3 communicating with the pump chamber 8a, and provided with balls and compressor springs;

The fuel is drawn into the pump chamber through the pipe `12 forcing down the ball valve and compressor spring entering the pump through the discharge 29.

.On the inward stroke of the pump, the

spring yforces the ball back to its seat, and t e fuel then enters the passage 30 forcing the ball valve 31 on its way out to pipe 32.

If too great pressure is develo ed by the pump, the fuel' passes through t e passage 54 raising the ball valve 55 against the force of the spring 56 and then passes through the passage 57 back into the fuel tank through pipe 12, or into the pump chamber 8u through passage 29. -The other end of the pipe 32 is connected to a suitable fitting 33 which is carried by a stand 34 in turn connected to the frame on the machine.

vOn this fitting 33 are the control valves 34a whichwhen open allow the fuel to pass through supply pipe 35 which, in turn, feeds to the burning and jet pipe, as fully described in my co-pending application.

The pump 9 being automatically operated, it has been found necessary to provide auxiliary means in the form of a hand pump 58 to supply the fuel to the burner before the main pump comes into operation. This hand pump is adapted in operation to draw fuel from the pipe 12 through the opening 29 and into the chamber 8a and then through the passage 30 and the valve 31 into the pipe 32.

When the burning is completed and to allow the pressure in the heating and jet pipes, I provide a valve which allows the pressure y in these pipes to act to force the fuel oil back therefrom through the valve 61 and pipe 62 into the fuel tank through the pipe 12.

From the foregoing, the operation of my -improved pump will be readlly understood.

v In the first place, the fuel is drawn through the pipe 12 into one of the valves 8, this valve being spring-actuated and automatically held in closed position as shown in Figure 3, and consisting essentially of a ball 17 'adapted to communicate with the seat and spring-held there by means of the compressor spring 18, the lower end of the valve casing being provided with a discharge opening or channel communicating with the pump chamber.

vThis may be termed the intake valve, while the valve communicating with the pump chamber through the passagewa 30 and provided with ball means 31 wit out any spring, but designed to keep the valve automatically close to gravity. It may be termed a discharge valve communicating with the discharge pipe 32.

Connected with this valve are the safety means for automaticall pressure and consisting o a spring-operated all valve 55, adapted to automatically close the opening in the seat 55, which opening communicates through a passage 54 with a passageway 32. v

It will be thus noticed that the pump occupies a very small space, is complete not.

only in pum ing means, but also in means for automatically regulating the pressure, as well as being provided with and connected to anypump means for starting the distributing of the fuel before the machine begins to move.

. As many changes could be'made in the above construction, and many apparently widely different embodiments of my invention, within the scope of the claims, conregulating the municating with the pump chamber, a ball-operated discharge valve communieating with the pump chamber, and fuel conveying pipes, the second spring-actuated ball valve communicating with the first-mentioned ball valve and with the discharge valve whereby, on the pressure exceeding a predetermined limit, the fuel is returned to the first-mentioned or intake ball valve, and to the pump chambers, and pump means communicating with the ball discharge valve.

2. In a fuel pump of the character described, a pump having a pump chamber therein, a spring-actuated ball-operated intake valve communicating with the pump chamber, the gravity-operated ball valve communicating with the pump chamber and the discharge pipe, and pressure control means communlcating with the aforementioned valves and comprising a spring-actuated ball valve, and supplemental hand pump means communicating with the 'discharge valve.

3. The combination with the pump as claimed in claim 2 of a'hand pump adapted to draw fuel `into the pump chamber and to discharge it from said chamber into the fuel line pipe.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

VERNON WOOD PARRISH.

Witnesses:

RICHARD BOYD DAVIDSON, GEORGE MCKAY CALDER. 

